# GLM 5.3 Fp4 API Pricing

As of October 21, 2026, GLM 5.3 Fp4 costs $1.12 per 1M input tokens and $4.40 per 1M output tokens on CoralBricks, with cache reads at $0 and cache writes at $1.68 per 1M tokens. It has a 1,048,576-token context window.

- Page: https://models.litellm.ai/models/glm-5.3-fp4
- Lab: Z.ai
- LiteLLM model name: `coralbricks/glm-5.3-fp4`
- Context window: 1,048,576 tokens
- Added to LiteLLM: October 12, 2026
- Prices updated: October 12, 2026

## Pricing by provider

Token prices in USD per 1M tokens.

| Provider | Model name | Input | Output | Cache read | Per image | Per second | Context |
|---|---|---|---|---|---|---|---|
| CoralBricks | `coralbricks/glm-5.3-fp4` | $1.12 | $4.40 | $0 | – | – | 1M |

## Cost examples

1,000 requests with 2,000 input and 500 output tokens each:

- CoralBricks: $4.44

100 long-document requests with 100,000 input and 2,000 output tokens each:

- CoralBricks: $12.08

## Features

Supported: Function calling, Reasoning, Prompt caching.
Not supported: Image input.

## Use it with LiteLLM

```python
from litellm import completion

response = completion(
    model="coralbricks/glm-5.3-fp4",
    messages=[{"role": "user", "content": "Hello!"}],
)
```

## Cost calculator

10,000 requests a day with 1,000 input and 500 output tokens each, at CoralBricks's price: $0.00332 per request, $33.20 per day, $996 per month (30 days). Try other numbers at https://models.litellm.ai/calculator?model=glm-5.3-fp4

## FAQ

### How much does GLM 5.3 Fp4 cost?

GLM 5.3 Fp4 costs $1.12 per 1M input tokens and $4.40 per 1M output tokens on CoralBricks, with cache reads at $0 and cache writes at $1.68 per 1M tokens.

### What is the context window of GLM 5.3 Fp4?

GLM 5.3 Fp4 has a 1,048,576-token context window.

### Which providers offer GLM 5.3 Fp4?

GLM 5.3 Fp4 is available from CoralBricks through LiteLLM, using the model name coralbricks/glm-5.3-fp4.

### How do I call GLM 5.3 Fp4 with an OpenAI-compatible API?

Use the LiteLLM Python SDK with model="coralbricks/glm-5.3-fp4", or add the model to the LiteLLM proxy's config.yaml and send requests to /v1/chat/completions from any OpenAI client. LiteLLM tracks the cost of every request at the prices on this page.

### What features does GLM 5.3 Fp4 support?

GLM 5.3 Fp4 supports function calling, reasoning and prompt caching. It does not support image input.

### When did LiteLLM add GLM 5.3 Fp4?

GLM 5.3 Fp4 was added to LiteLLM's model price file on October 12, 2026.

Source: LiteLLM model price file, https://github.com/BerriAI/litellm/blob/main/model_prices_and_context_window.json. Maintainers update it from each provider's published pricing, and this page is usually rebuilt within 20 minutes of every change.